Heater for automobiles



June 16, 1925. 1,541,821

J. w. KELCH ET AL HEATER FOR AUTOMOBILES Filed Feb. 12, 1925 I N V EN TORS Ja mes WE? ZcA J mea I 50nda Ffigaev' ink 50% Kel er A TTORNEYS Patented ant- 6, 1925 UNITED STATES PATENT, OFFICE.

JAMES w. men, JAMES J. SUNDAY, am) mare]; scmun'rna, or DETRDIT,' MICHIGAN. 1

m'rna son euromonrnns.

' Application filed February 1 2, 1925.- Serial no. 8,779.

.To all whom it may cmtcer'n:

Be it known that we, JAMES JAMns J. SUNDAY, and FREDRIGK SOHLUE- TER, citizens 6f the United States of America, residing at Detroit, in the county of Wayne and State of Michigan, have invented certain new and useful Improvements in Heaters for Automobiles, of which the following is a specification, reference being had therein to the accompanying drawing. 1

This invention relates generally to heating .apparatus for motor vehicles and; refers more particularl -to heaters in which air from the atmosp ere is heated within a suitable shell by the exhaust gases from the engine of the motor vehicle.

-)ne of the essential objects of the invention is to {provide a compact and efli cient heater 0 this type in which the-exhaust gases from the engine'aredirected by. positive means .intothe tubes of the core to facilitate the passage of the ases through the shell and thereby eliminate back pressure on the motor.

Another object is 'to 'provide a heater that may be easily attached toor detached from spaced portions of the*exhaust conduit of the vehicle and-that may be quickly readily cleaned or repaired.

exhaust gases are preferably brazed at their opposite ends to the headers to prevent the parts working loose causing leakage of ex-.

haust gases. a

{With the above and other objects in view the invention consists in certain novel fea-f w. Kama,

assembled or taken'apartso'that it may bev Figure 4 is a sectional view taken on the line 1-4 of Figure 2.

Figure 5 is a sectional line 55 of Figure 2. I

Referring now to the drawing in which like characters of reference deslgnate corresponding parts throughout the several views, the numeral 1 designates a motor vehicle having an engine exhaust'conduit 2 to which the heater 3 embodying our inview taken on the Y vention ispreferably attached. As shown,

the heater 3 is preferably provided with' an outer shell or casing 4 that is prefer- A v ably cylindricalin form and is closed at its opposite ends by substantially fimnelshaped heads 5 and 6 respectively sleeved.

upon portions 2 and 2- of the exhaust condult 2. Thus, the tubular portion 5" of the head 5 constitutes an inlet port for the exhaust gases, while the tubular por; tion 6" of the head 6 constitutes an outlet passa e. Any suitable means may be employe for conveying air from the atmosphere to'the shell 4 and from the shell to the body 5' of the vehicle. As shown, a suitable pipe 6 extends forwardly from the shell 4 adjacent to the forward end thereof, and terminates in a flared portion 7 preferably adjacent to the fan 8 of the engine, while a second pipe 9 extends rear- -wardly from the shell 4 adjacent to the rear end' thereof and connects into a suitable air register-1O which may beloca'ted at any convenient place such as in the floor 'of the vehicle body.

In, order that the exhaust gases from the engine will not mix with the air discharged by the conduit 6 into the shell 4, we pref erably provide the shell with a suitable core 11. "As shown, thiscore preferably comprises two hcaders 12 and 13 respectively and a plurality of spacedstrai'ght tubes 14 that extend between said headers 12 and 13.

" These tubes may be made ofanysuitable material such-as copper or aluminum and are preferably arranged closer together at their rear ends so that the desired concentration of heat may be obtained. To revent back pressure on the engine as wel as objectionable noise, the forward header 12 is preferably provided at, the centre thereof with an inwardly extending concave portion 15, and the tubes 14. are preferably provided at their forward ends with flared portions 16 that are secured in the concave portion 15 of the header; To provide a described and that such changes may be rescope of what is claimed.

What we claim as our invention is:

1. A heater for motor vehicles including sorted to when desired as fall within the strong and durable construction, the tubes\ a shell having inlet and outletports for 14 are preferably brazed to the headers 12 and. 13 respectively. -Thus, the tubes are not likely to work loose while the heater is in use. a

In order that the shell i and core 11 o'f the heater may be easily and quickly as sembled or taken apart, the header 12 is' preferably clamped between the flanges 17 and 18 respectivel of the. shell 4 and head 5 by meansof suitable bolts 19,- while the header 13 is preferablybolted'to anannular plate 20 that is clamped between the flanges '21 and 22 respectively of the shell 4 and head 6 by means of the bolts 23. To facilitate attachment of the heater to the exhaust p1pe 2, the tubular portions 5 and 6 respectively of the heads 5 and 6 are sleevedupon the adjacent portions of the conduit 2 and are preferably clamped in position thereon by means of the split collars 26. Thus, with this construction, the heater may be readily removed from the conduit2 and taken. apart to be cleaned or repaired.

If desired, a suitable baffle 27 -may be sleeved upon certain of the tubes 14 of the core approximately midway of the shell for deflecting downwardly the air discharged from the conduit 6; Thus a better circula tion of the air is obtained within the shell 4. A cover 28,preferably of asbestos may be discharged by the forward portion 2 of the exhaust conduit against the concave .portion 15 of the header 12' which will direct-the gases to the flared inlet ends 16 of the tubes, consequently, the gases will enter theoutermost tubes 1441s readily as .While it is believed .that from the fore-- going description the nature and advantages of our invention is readily apparent, we

desire to have it understood that we do not limit ourselves to what is herein shown and of tubes extending between said inlet and outlet ports, and means opposite to and in rearof the inlet port for directing the ex- .haustflgase's into the tubes, said means being so constructed" as to eliminate back pressure. on the motor.

2. A heater for motor vehicles including .a shell having inlet and outlet ports in the opposite ends thereof for the exhaust gases of the motor, a plurality of tubes extending longitudinally ofthe shell between said inlet and outlet'ports, and means in rear of the inlet port for directingthe exhaust gases into thetubes, said means being so constructed as to eliminate back pressure on between the said inlet and outlet ports, and a header for the tubes opposite to the inlet port constituting means for directing the exhaust gases from the inlet portinto the tubes, said header being constructed and arranged with respect to said inlet port to eliminate back pressure on the motor.

4. A heater for motor vehicles including a shell having inlet and outlet ports for the exhaust gases, of the motor, a core'having tubes extending between said inlet and outlet .ports, and a header having a concave ortion opposite to the inlet port aforesaid or directing the exhaust gases into the tubes, said header and concave portion being arranged with respect to said inlet port to eliminate back pressure on the motor.

5. In a heater for motor vehicles, the combination .with' a tubular shell having substantially aligned inlet and outlet ports for the exhaust gases of the motor, and a plurality of tubes extending longitudinally of the shell for conveying the exhaust gases in substantially astraight line from the inlet portito the outlet port, of means opposite to the inlet ort for directing the exhaust gases into e tubes whereby the passage of gases through the tubes will be substantially uniform, said means being so constructed as to eliminate back pressure on the motor.

6. In a heater for motor vehicles, the combination with a tubular shell having inlet and outlet ports for the exhaust gases of the motor at the o posite ends thereof, and an inwardly flare portion immediately in rear of the inlet port, a core having tubes extending longitudinallv of the shell be inlet port through'the tubes to the outlet tween said inlet and outlet ports, anda port. a I header for the tubes having a concave por- In testimony whereof we afiix our signa- 1 tion opposite to the flared portion aforesaid tures. Y

'for directing the exhaust gases into the JAMES W.'KELCH.'

tubes so that the said gases will flow freely JAMES J. SUNDAY; insubstantialb a straight; line from the FREDRICK SCHLUETER. 

